I don't know much about sour beers but I was mentioning the idea of making one in the future and SWMBO was not too keen on the idea because she has some pretty bad allergies and is allergic to dust/mold/etc.

Does anyone have any articles that prove one way or another if that kind of mold or fungus (whatever it is) can affect allergies?

Sour beers are not made using mold or fungus, but bacteria. Brettanomyces is a yeast similar to regular brewing yeast (but more tenacious). Lactobacillus is the same bacteria found in most yogurt, so if she's allergic to yogurt you should steer clear. Pediococcus is related to lacto.